This seminar will examine the extent to which international law addresses a range of regional and global environmental problems, including those relating to the climate (e.g. climate change and ozone depletion), the sea (e.g., marine pollution and fisheries), and land (e.g., transboundary movement of hazardous waste and conservation of endagered species and other exhaustible natural resources). We will try to understand why international negotiations and law have been more successful at addressing some problems than others. In that effort, we will consider legal tools, as well as the politics and economics of each problem under study. Term paper; no final exam.